Dear Peter and others, (01)
I hope to attend the telecon and participate in the work. (02)
I strongly agree with Ed's recommendation that we consider the International
Vocabulary for Measurement (VIM)
http://www.bipm.org/en/publications/guides/vim.html. It is important that
things in any ontology for quantities and units are related to the things
defined in this document - which has the advantage of being on the Web,
unlike most ISO standards! (03)
On the one hand the document is authoritative, but on the other hand there
are difficulties with the language used, which creating an ontology may clarify. (04)
For example, the definition of "quantity value" is "number and reference
together expressing magnitude of a quantity". This definition suggest to me
a "quantity value" is some sort of data structure (i.e. "number and
reference together") which describes a "magnitude of a quantity". But we
also have: (05)
NOTE 1 According to the type of reference, a quantity value is either
— a product of a number and a measurement unit, or
— a number and a reference to a measurement procedure, or
— a number and a reference material. (06)
The first item in this list is a very different sort of thing. We usually
assume that the "product" of a number and a length unit (say) is a
particular length. Getting all this tied down with an ontology is a worthy task. (07)
At 12:14 29/05/2009 -0400, you wrote:
>> I am writing to ping everyone, one more time, to find out:
>> 1. who is interesting to participate in getting the said Units of
>> Measure ontology effort going.
>I am interested because I think a basic reference ontology for
>'quantity' is needed. According to the International Vocabulary for
>'measurement unit' is one class in that ontology, and it is a subtype of
>'quantity'. Further, standardized instances of 'measurement unit'
>belong to a 'system of measurements' which is intimately related to a
>taxonomic decomposition of 'quantity'. So I think the 'basic quantity
>ontology' is inseparable from an 'ontology for units of measure'.
>> 2. who is willing to provide some level of leadership to get this
>> effort off the ground.
>It makes sense that NIST should lead -- the NIST participants should
>take that up offline.
>> 3. who would be joining us if we do run a virtual panel session on
>> this on Thu 2009.06.11
>I will try to attend, but I have a likely conflict from 1300-1500 EDT.
>> 4. if you are joining, and would like to be a panelist, please provide
>> a title and an abstract of what you might share with in in a 10~15
>> minute brief.
>I have said my piece above. I would rather listen to others.
>> 5. besides PatCassidy, who else has (access to) a UoM related
>> ontology, that he/she can upload to the OOR sandbox and some other
>> publicly accessible ontology repository? (if the latter, please advise
>> where the repository is.)
>I have a sketch (UML diagrams with definitions) built for another (now
>dubious) project, which I will upload.
>Surely this must also have been addressed in Cyc and DOLCE and BSO.
>Edward J. Barkmeyer Email: edbark@xxxxxxxx
>National Institute of Standards & Technology
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